I want 2 ad wbsites,emails,cousins,sibling… etc on my facebook profile,wt kan I do?

You will have to update these details on "Info Tab" on facebook. Before you can do that, you will have to create a list with all your cousins and siblings. Login to facebook -> Click on "Friends" link from the left -> Edit Friends -> "Create New List". Select the facebook friends and create a new list. You can then go to "info" tab and make the necessary changes. good luck!